Draft-genarator.



D. H. BUTLER.

'DRAFT GENERATOR.

APPLICATION FILED JAN.14,1914.

1,121, 17 1. Patented Dec. 15,1914.

THE NORRIS PETERS coy. PHoro LITHO, WASHING roN. D. c.

DIHMZZOZ 1-7. Butler tinirn ens rarer rip. v

D NALD I-I. BUTLER, or EL RENO, OKLAHOMA.

Q 1 DRAFT-GENERATOR.

anama specification of L ws Patent.

Patented Dec.15,191et.

Application filed January 14, 191 i. Serial No, 812,127.

To all whom it may concern:

j Be it known that LDoNALD H..BUTLER, a citizen of the United States, residing at El Reno, in the county of Canadian and State of Oklahoma, have invented new and useful Improvements in Draft-Generators, of which V the following is a specification.

This invention relates to draft generators for steam boilers, the ob ect of the nvention being toprovide in connection with a steam boiler, a blower or fan including driving connections and a discharge nozzle arranged for manual operation'and adapted to deliver a blast of air in an upward direction in or adjacent to the bottom of the smoke stack for the purpose of inducing a pronounced draft in the proper direction before there is any steam pressure in the boiler. I

' With the above and other objects in view, the invention consists in the novelconstruction, combination and arrangement of parts,

as will hereinafter be-more fully described, illustrated and claimed. I

In the drawings: Figurevlis a side elevation of a 'steam -boiler showing the draft generator of this invention applied thereto. Fig. 2 attachment.

tached from the boiler, showing also the .operating crank and tumbling shaft.

Referring to-the drawings 1 designates an ordinary steam boiler provided with the usual stack 2 and dome 3; V

In carrying out the present invention I employ a fan casing 4: which is disposed vertically when applied tothe boiler 1 as shown in Fig. 1, said casing being attached to one I end of a gear case designatedgenerally at A and comprising theseparable sections 5 and 6 one of which may be removed to afford access to the mechanism contained therein.

is' a horizontal section through the Fig. 3 is a detail'perspective' view of the gear case and fan casing d'e fast thereon, said shaft being journaled in bearings 12 in the gear case A. Meshing with the worm 11 is a wormwheel 13 on the f shaft of which is a spur pinion 1a which is driven by a spur wheel l5'on the shaft of which is a spur pinion 16 that meshes with aninitial driving spur wheel 17 The wheel 17 in addition to the spur gear face is provided with a bevel gear face 18 which meshes with and is driven by a bevel pinion '19 fast on the inner section 20 ofa tumbling shaft. This'tumbling shaft is provided with one or more additional sections 21 and 22 to enable said shaft to extend lat:

erally to one side of the steam dome 3, the final section, of said tumbling shaft being provided with a hand crank 23 by means of which the draft generator may be manu ally operated at such times as may be neces sary to increase the draft for the purpose stated. 1 I i j The draft generator hereinabove described is,byreason of the construction set forth, particularly. adapted for use as an atplace by merely securing-the section 5 of the gear case to the top of theboiler as shown in-Fig. 1 and forming a hole adjacent to the base of' the stacki2 through which the discharge pipe8 is inserted. The tumbling dome 3 and said shaftmay be of such length as to locate the operating crank 23 at any desired or convenient point.

What I claim is A draft generating attachment for steam boilers, comprising a rotary fan, a discharge pipe leading off tangentially therefrom, a blast nozzle located in the base of the smoke stack with which said discharge pipe communicates, a flat and substantially rectangular gear case to one end of which the fan casing is attached, and manually operable means for driving and supporting said fan embodying a train of speed increasing gears ournaled 1n and inclosed by said gear case and operatively connected with the fan shaft, the initial gear having a bevel gearface in addition to its speed gear face, .and an operating shaft having a plurality of tumbling oints therein and provided at one end with an operating crank and at its other end with a bevel pinion meshing with said tachment to steam boilers and is fastened in shaft may lead to either side of the steam bevel gear face of the initial speed gear, the In testimony whereof I affix mysignature said gear case being supported in parallel in presence of two Witnesses. relation to the shell of the boiler between the smoke stack and steam dome, said tumbling shaft extending to one side of said Witnesses: steam dome and back to the furnace end of- HARRY LEE FOG'G, the boiler. r OSCAR R-'H OKVARD.

DONALD H. BUTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

